[575] | 1 | %'calc_field_interp': defines fields (velocity, vort, div...) from civ data and calculate them
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| 2 | % for projection with linear interpolation
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[515] | 3 | %---------------------------------------------------------------------
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[579] | 4 | % [VarVal,ListVarName,VarAttribute,errormsg]=calc_field_interp(Coord,Data,FieldName,XI,YI)
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[515] | 5 | %
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| 6 | % OUTPUT:
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[575] | 7 | % VarVal: array giving the values of the calculated field
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[579] | 8 | % ListVarName: corresponding list of variable names
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| 9 | % VarAttribute: corresponding list of variable attributes, each term #ilist is of the form VarAttribute{ilist}.tag=value
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[515] | 10 | %
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| 11 | % INPUT:
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[579] | 12 | % Coord(nbpoints,2): matrix of x,y coordinates of theinput data points
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| 13 | % Data: inputfield structure
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| 14 | % FieldName: string representing the field to calculate, or cell array of fields (as displayed in uvmat/FieldName)
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| 15 | % XI, YI: set of x and y coordiantes where the fields need to be linearly interpolated
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[515] | 16 |
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[579] | 17 | function [VarVal,ListVarName,VarAttribute,errormsg]=calc_field_interp(Coord,Data,FieldName,XI,YI)
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[515] | 18 |
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[579] | 19 | VarVal={};
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[515] | 20 | ListVarName={};
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| 21 | VarAttribute={};
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| 22 | errormsg='';
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[517] | 23 | InputVarList={};
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[579] | 24 | if ischar(FieldName),FieldName={FieldName};end
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| 25 | check_skipped=zeros(size(FieldName));% default, =1 to mark the variables which can be calculated
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| 26 | Operator=cell(size(FieldName));
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| 27 | for ilist=1:numel(FieldName)
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| 28 | Operator{ilist}='';%default empty operator (vec, norm,...)
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| 29 | r=regexp(FieldName{ilist},'(?<Operator>(^vec|^norm|^curl|^div|^strain))\((?<UName>.+),(?<VName>.+)\)$','names');% analyse the field name
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| 30 | if isempty(r) % the field name is a variable itself
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| 31 | if ~isfield(Data,FieldName{ilist})
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| 32 | check_skipped(ilist)=1; %variable not found
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[521] | 33 | else
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[579] | 34 | if isempty(find(strcmp(FieldName{ilist},InputVarList), 1));
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| 35 | InputVarList=[InputVarList FieldName{ilist}];% the variable is added to the list of input variables if it is not already in the list
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[521] | 36 | end
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[517] | 37 | end
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| 38 | else
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[579] | 39 | if ~isfield(Data,r.UName)||~isfield(Data,r.VName)%needed input variable not found
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[521] | 40 | check_skipped(ilist)=1;
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[579] | 41 | elseif strcmp(r.Operator,'curl')||strcmp(r.Operator,'div')||strcmp(r.Operator,'strain')
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| 42 | Operator{ilist}=r.Operator;
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| 43 | switch r.Operator
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| 44 | case 'curl'% case of CivX data format
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| 45 | UName{ilist}='vort';
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| 46 | Data.vort=Data.DjUi(:,1,2)-Data.DjUi(:,2,1);
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| 47 | case 'div'
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| 48 | UName{ilist}='div';
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| 49 | Data.div=Data.DjUi(:,1,1)+Data.DjUi(:,2,2);
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| 50 | case 'strain'
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| 51 | UName{ilist}='strain';
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| 52 | Data.strain=Data.DjUi(:,1,2)+Data.DjUi(:,2,1);
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| 53 | end
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| 54 | InputVarList=[InputVarList UName{ilist}]; %the variable is added to the list if it is not already in the list
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[521] | 55 | else
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| 56 | UName{ilist}=r.UName;
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| 57 | VName{ilist}=r.VName;
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| 58 | if isempty(find(strcmp(r.UName,InputVarList)));
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| 59 | InputVarList=[InputVarList UName{ilist}]; %the variable is added to the list if it is not already in the list
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| 60 | end
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[579] | 61 | if isempty(find(strcmp(r.VName,InputVarList), 1));
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[521] | 62 | InputVarList=[InputVarList VName{ilist}]; %the variable is added to the list if it is not already in the list
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| 63 | end
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| 64 | Operator{ilist}=r.Operator;
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[517] | 65 | end
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[515] | 66 | end
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| 67 | end
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[517] | 68 | %create interpolator for linear interpolation
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| 69 | if exist('XI','var')
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| 70 | for ilist=1:numel(InputVarList)
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| 71 | F.(InputVarList{ilist})=TriScatteredInterp(Coord,Data.(InputVarList{ilist}),'linear');
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| 72 | end
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[515] | 73 | end
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[579] | 74 | for ilist=1:numel(FieldName)
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[521] | 75 | if ~check_skipped(ilist)
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[533] | 76 | nbvar=numel(ListVarName);
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| 77 | switch Operator{ilist}
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| 78 | case 'vec'
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[517] | 79 | if exist('XI','var')
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[533] | 80 | VarVal{nbvar+1}=F.(UName{ilist})(XI,YI);
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| 81 | VarVal{nbvar+2}=F.(VName{ilist})(XI,YI);
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[517] | 82 | else
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[533] | 83 | VarVal{nbvar+1}=Data.(UName{ilist});
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| 84 | VarVal{nbvar+2}=Data.(VName{ilist});
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[517] | 85 | end
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[533] | 86 | ListVarName{nbvar+1}=UName{ilist};
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| 87 | ListVarName{nbvar+2}=VName{ilist};
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| 88 | VarAttribute{nbvar+1}.Role='vector_x';
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| 89 | VarAttribute{nbvar+2}.Role='vector_y';
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| 90 | case 'norm'
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| 91 | if exist('XI','var')
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| 92 | U2=F.(UName{ilist})(XI,YI).*F.(UName{ilist})(XI,YI);
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| 93 | V2=F.(VName{ilist})(XI,YI).*F.(VName{ilist})(XI,YI);
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| 94 | else
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| 95 | U2=Data.(UName{ilist}).*Data.(UName{ilist});
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| 96 | V2=Data.(VName{ilist}).*Data.(VName{ilist});
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| 97 | end
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| 98 | VarVal{nbvar+1}=sqrt(U2+V2);
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| 99 | ListVarName{nbvar+1}='norm';
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[517] | 100 | VarAttribute{nbvar+1}.Role='scalar';
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[579] | 101 | case {'curl','div','strain'}
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| 102 | if exist('XI','var')
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| 103 | VarVal{nbvar+1}=F.(UName{ilist})(XI,YI);
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| 104 | else
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| 105 | VarVal{nbvar+1}=Data.(UName{ilist});
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| 106 | end
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| 107 | ListVarName{nbvar+1}=UName{ilist};
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| 108 | VarAttribute{nbvar+1}.Role='scalar';
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[533] | 109 | otherwise
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[579] | 110 | if ~isempty(FieldName{ilist})
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[533] | 111 | if exist('XI','var')
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[579] | 112 | VarVal{nbvar+1}=F.(FieldName{ilist})(XI,YI);
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[533] | 113 | else
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[579] | 114 | VarVal{nbvar+1}= Data.(FieldName{ilist});
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[533] | 115 | end
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[579] | 116 | ListVarName{nbvar+1}=FieldName{ilist};
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[533] | 117 | VarAttribute{nbvar+1}.Role='scalar';
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| 118 | end
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| 119 | end
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[515] | 120 | end
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| 121 | end
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[517] | 122 | % put an error flag to indicate NaN data
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[579] | 123 | if exist('XI','var')&&~isempty(VarVal)
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[533] | 124 | nbvar=numel(ListVarName);
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| 125 | ListVarName{nbvar+1}='FF';
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| 126 | VarVal{nbvar+1}=isnan(VarVal{nbvar});
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| 127 | VarAttribute{nbvar+1}.Role='errorflag';
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[517] | 128 | end
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[515] | 129 |
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| 130 | % Attr_FF.Role='errorflag';
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| 131 | % VarAttribute=[VarAttribute {Attr_FF}];
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| 132 |
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| 133 |
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| 134 |
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| 135 |
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| 136 |
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